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What is the total resistance in the above diagram?

...
What is the total resistance in the above diagram?

What is the total resistance in the above diagram?

A.

5 ohms

B.

15 ohms

C.

25 ohms

D.

35 ohms

E.

45 ohms

Correct answer is C

Resistance in series will be given as R = 10+10 → 20

Resistance in parallel will be given as \(\frac{1}{R}\) = \(\frac{1}{10}\) + \(\frac{1}{10}\) 

\(\frac{1}{R}\) =  \(\frac{2}{10}\) → \(\frac{1}{R}\) = \(\frac{1}{5}\)

Resistance in parallel = 5

Total resistance = 20 + 5 → 25ohms